Toilet fill valve not shutting

[studiocitylen]

Sliding spring clip up/down does not shut water in tank.(Fluidmaster 400A)
Adjustments do not shut water in time-it goes into overflow tube.
What should I do?Thanks.

 

[FlushMasta]

replace it (the fillvalve, not the toilet )

 

[johnjh2o]

You need a replacement seal.
Fluidmaster 242 Fill Valve Replacement Seal

John

 

[havasu]

Or just purchase a new unit for < $8.00!